Arteria circumflexa scapulae

Arteria circumflexa scapulae is a branch of the subclavian artery that supplies blood to the scapula, the bone that connects the humerus (upper arm bone) with the clavicle (collar bone).

Anatomy

The arteria circumflexa scapulae, also known as the circumflex scapular artery, typically arises from the subscapular artery, which is a branch of the third part of the subclavian artery. It travels around the lateral border of the scapula, passing through the triangular space to reach the infraspinatus and teres major muscles.

Function

The primary function of the arteria circumflexa scapulae is to supply blood to the muscles and other tissues in the region of the scapula. It also contributes to the scapular anastomosis, a network of blood vessels that provides a collateral circulation pathway to the arm. This is particularly important in cases where the main arterial supply to the arm is compromised, such as in thoracic outlet syndrome.

Clinical significance

Knowledge of the arteria circumflexa scapulae is important in surgical procedures involving the shoulder region, such as shoulder arthroscopy and rotator cuff repair. Damage to this artery during surgery can lead to ischemia (lack of blood supply) and subsequent tissue damage.

See also

• Subclavian artery
• Scapula
• Scapular anastomosis
• Thoracic outlet syndrome